Ive been noticing our balloon molly has lost a lot of color since we got him 2 and a half months ago. Will attach a picture of how he looked when we got him and now he’s just plain black. Barely any white on him. Is this a bad sign or does the color just fade when they get older? Picture is from March 26th. His top fin where it’s white everywhere is just all black now. Same as his tail. Only white he really shows is his belly.